The design and installation shall reasonable, the capacity and strength shall be enough, the support shall be firm, the meters shall be complete and the piping shall be not vibrate.It is not allowed to used dark bar valve, and the valve shall have fine thread rod, the valve installation shall not make the valve stem vertically upward. the  check-valve shall be flexible and shall be closed tightly. The flange connection shall be less used as  possible, If it is necessary to use, the flange gasket shall be high temperature resistant material, and the flange shall be provided with iron sheet cover. Oil tube shall be far away from the heat body as possible,  if not, the heat body shall be provided with firm and complete insulation, and shall be wrapped with iron sheet or glass fiber cloth painted with painting. The oil system must be provided with emergency oil  tank, which shall be provided  outside the main building. The emergency oil drain valve shall be  at the place convenient for operation that is far away from the oil tank. The hand wheel shall be equipped with a disposable tank cover, the piping, equipment, parts and instrument of the whole system shall be kept clean, shall be free of sundries and shall be provided with the devices against the entering of steam, water and dust. （js）